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According to the Mazda parts catalouge there are two o-rings in the LIM where the secondary injectors go. I removed my fuel rails and removed the rubber grommet but could not find a o ring beneath it.
Do I have to remove the diffusor to get to the o ring?
No. You need to carefully remove the atomizer and often they break. Use a pick, wd40, and gently remove it. If any breaks off be prepared to vacuum out the intake. I recommend buying new ones as they get brittle. It will come with a new oring.
